阅读说明：本技术 无续流开关的降压交流斩波调压电路及其应用 (Voltage-reducing AC chopping voltage regulating circuit without follow current switch and application thereof ) 是由 龚秋声 于 2019-08-16 设计创作，主要内容包括：无续流开关的降压交流斩波调压电路,它由1个双向斩波开关S、2个电容C1和C2、1个耦合电感Z或2个电感L1和L2组成,双向开关S由2个二极管和2个三极管或4个二极管和1个三极管组成,有2个输入端(1、2),2个输出端(3、4)。包含有两个电路：Gong′s耦合电感电路和Gong′s双电感电路。它们与现有同类降压调压电路相比：具有成本低、可靠性好、效率高等忧点。可广泛用于降压交流调压和交流稳压电源等领域,具有很大的经济效益和社会效益。这两个Gong′s单开关降压调压电路的发明,是崛起的中国人给世界电力电子科学的新贡献。(A step-down AC chopping voltage regulating circuit without follow current switch is composed of 1 bidirectional chopping switch S, 2 capacitors C1 and C2, 1 coupling inductor Z or 2 inductors L1 and L2, the bidirectional switch S is composed of 2 diodes and 2 triodes or 4 diodes and 1 triode, and has 2 input ends (1, 2) and 2 output ends (3, 4). The circuit comprises two circuits: gong's couples the inductive circuit and Gong's dual inductive circuit. Compared with the prior similar step-down voltage-regulating circuit: has the advantages of low cost, good reliability, high efficiency and the like. The method can be widely applied to the fields of voltage reduction, alternating current voltage regulation power supply and the like, and has great economic and social benefits. The invention of the two Gong's single-switch voltage reduction and regulation circuits is a new contribution of the rising Chinese to the world power electronic science.)

1. The step-down AC chopper voltage-regulating circuit without follow current switch is composed of 2 capacitors C1 and C2, 1 coupling inductor Z or 2 inductors L1 and L2, a double-phase switch S and a control circuit thereof, and is provided with 2 AC input ends (1, 2) and 2 AC output ends (3, 4), wherein the coupling inductor Z is composed of 2 windings to form an inductor L1 and an inductor L2, and the step-down AC chopper voltage-regulating circuit is characterized in that: the inductors L1 and L2 are connected with the capacitors C1 and C2 in a cross mode, the first direct current input end (1) is connected with one end of a bidirectional switch S, the other end (5) of the bidirectional switch S is connected with one end of a capacitor C2 and one end of an inductor L1, the second alternating current input end (2) is connected with one end of a capacitor C1 and one end of an inductor L2, the first alternating current output end (3) is connected with the other end of an inductor L1 and the other end of a capacitor C1, and the second alternating current input end (4) is connected with the other end of a capacitor C2 and the other end of an inductor.

2. The buck ac chopper regulator circuit without a freewheeling switch of claim 1, wherein: the 2 windings of the coupling inductor Z have the same number of turns and direction and are respectively connected in series between 2 inputs and 2 outputs.

3. An alternating current stabilized power supply designed by the application claim 1 is characterized in that: the two ac outputs (3, 4) of claim 1 are connected to 1 step-up mains frequency autotransformer T, the two terminals (6, 4) of which are the two outputs of the regulated ac power supply.

Detailed description of the preferred embodiments

In order to further understand the technical solution of the present invention, the following detailed description is made by specific examples.

Fig. 1a shows an original buck ac chopper voltage regulator, which is composed of a master control full-control bidirectional switch S1, a follow current full-control bidirectional switch S2, 1 filter inductor L, and 1 filter capacitor C. And S1 and S2 are bidirectional full-control switches consisting of diodes and triodes.

Fig. 1b shows a Gong' S buck ac chopper voltage regulator invented by the same inventor in 2013, which is composed of a master control full-control bidirectional switch S1, a follow current half-control bidirectional switch S2, 1 filter inductor L and 1 filter capacitor C. It is characterized in that the freewheeling bidirectional switch uses a half-controlled bidirectional switch formed by inverting 2 thyristors to replace a freewheeling full-controlled bidirectional switch formed by 2 diodes and 2 triodes, so that the freewheeling bidirectional switch module has three-quarters of the cost and more reliable work,

the invention relates to a step-down AC chopper voltage regulating circuit of the No. 1 freewheeling switch in the attached figure 2a, which consists of a bidirectional full-control switch S, 2 capacitors C1 and C2 and 2 inductors L1 and L2. The capacitors C1, C2 are cross-connected with the inductors L1, L2. The voltage-reducing alternating-current chopping voltage-regulating circuit is 1 single-switch voltage-reducing alternating-current chopping voltage-regulating circuit, named as Gong's double-inductance voltage-reducing alternating-current chopping voltage-regulating circuit, and called as Gong's double-inductance circuit for short. The working principle is as follows:

1) when the bidirectional switch S is turned on, ac power at the input ends is supplied through the inductor L1, the load at the output ends, and the inductor L2, while the capacitor C2 is charged through the inductor L2, and the capacitor C1 is charged through the inductor L1. The capacitors C1 and C2 and the inductors L1 and L2 store energy. Since the inductances L1 and L2 limit the charging current of the capacitors C1 and C2, no inrush current is formed.

2) When the bidirectional switch S is turned off, a) the capacitor C2 and the inductor L1 store energy to supply power to the load at the two ends of the output, and the capacitor C2 provides a freewheeling loop for the self-inductance potential on the inductor L2: b) the capacitor C1 and the inductor L2 store energy to supply power to the load at the two ends of the output, and the capacitor C1 provides a freewheeling loop for the self-inductance potential on the inductor L2. Therefore, the inductor does not generate high voltage at the moment of S turn-off, and a bidirectional freewheeling switch is not needed, so that the bidirectional freewheeling switch S2 is saved.

The 2 nd buck AC chopper voltage regulator circuit without freewheeling switch of the invention shown in FIG. 2b is composed of a bidirectional full-control switch S, 2 capacitors C1, C2 and 1 coupling inductor Z. 2 inductors L1 and L2 shown in figure 2a are wound on the same magnetic core, and 2 windings of 1 coupling inductor Z are used for forming inductors L1 and L2, so that the number of components of the circuit is reduced, and the working principle is similar. The circuit shown in the figure 2b is named as a Gong's coupling inductance step-down alternating current chopping voltage regulating circuit, and is called as a Gong's coupling inductance circuit for short.

From the above, it can be seen that: the Gong's coupling inductance circuit and the Gong's double-inductance circuit are voltage-reducing chopping voltage-regulating circuits without follow current bidirectional switches. The voltage-reducing AC chopper voltage-regulating circuits are single-switch voltage-reducing AC chopper voltage-regulating circuits, and have no loss of follow-current bidirectional switches, so that the voltage-reducing AC chopper voltage-regulating circuits have the advantages of low cost, good reliability, high efficiency and the like. The invention of the two Gong's single-switch voltage reduction and regulation circuits is a new contribution of the rising Chinese to the world power electronic science.

A single-phase switch single-phase alternating current stabilized voltage power supply can be designed by applying the Gong 'S double-inductance circuit and the Gong' S coupling inductance circuit shown in the attached figure 2, and the attached figure 3 is the single-phase alternating current stabilized voltage power supply designed by applying the attached figure 2 b.